From e53a155c0aa94d2cdf1edc9ade0b1700a3d94005 Mon Sep 17 00:00:00 2001
From: winterdrive <90021888+winterdrive@users.noreply.github.com>
Date: Fri, 10 Jul 2026 07:12:36 +0800
Subject: [PATCH] fix(provider): flush pending debounced save on deactivation

The 500ms save debounce timer in TempFoldersProvider never gets a
chance to fire if VS Code closes shortly after a group/file/bookmark
edit, silently dropping that change. Register a subscription that
flushes it synchronously on deactivate.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
---
 src/extension.ts |  4 ++++
 src/provider.ts  | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/extension.ts b/src/extension.ts
index 626d994..49459b5 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -117,6 +117,10 @@ export async function activate(context: vscode.ExtensionContext) {
     context.subscriptions.push(treeView);
     treeView.description = provider.computeScopeDescription();
 
+    // Flush any pending debounced save on deactivation so a change made
+    // just before VS Code closes isn't lost.
+    context.subscriptions.push({ dispose: () => provider.flushPendingSave() });
+
     // Pass the tree view to the provider for selection management
     provider.setTreeView(treeView);
 
diff --git a/src/provider.ts b/src/provider.ts
index 44b85f3..30d16ba 100644
--- a/src/provider.ts
+++ b/src/provider.ts
@@ -331,6 +331,20 @@ export class TempFoldersProvider implements vscode.TreeDataProvider<vscode.TreeI
         }, 500);
     }
 
+    /**
+     * Synchronously flush a pending debounced save, if any.
+     * Call this on extension deactivation — otherwise an edit made just
+     * before VS Code closes can be lost, since the 500ms debounce timer
+     * never gets a chance to fire.
+     */
+    flushPendingSave(): void {
+        if (this.saveDebounceTimer) {
+            clearTimeout(this.saveDebounceTimer);
+            this.saveDebounceTimer = undefined;
+            this.saveGroupsImmediate();
+        }
+    }
+
     private saveGroupsImmediate() {
         if (this.groupManagers.size === 0) {
             console.warn('Cannot save VirtualTabs data: no GroupManagers available');